NAVAIR 17—2OAX—737
4.12.4 Set the TI FREQUENCY MHz switches to each of the following settings. At each setting, verify
that the harmonics (using the spectrum analyzer tuned to the TI frequencies and its harmonics) of all the
selected TI frequencies are 30 dB below the carrier level.
TI
FREQUENCY MHz
Switches Setting
108.000
115.000
130.000
145.000
157.000
4.12.5 Set the
TI FREQUENCY MHz
switches to 329.000.
4.12.6 Set the TI FREQUENCY MHz switches to each of the following settings. At each setting, verify
that the harmonics (using the spectrum analyzer tuned to the TI frequencies and its harmonics) of all the
selected TI frequencies are 30 dB below the carrier level.
TI
FREQUENCY MHz
Switches Setting
329.000
332.000
335.000
4.12.7 Set the TI FREQUENCY MHz switches 334.700 MHz.
4.12.8 Set the spectrum analyzer for a frequency span of
5
kF{z/div, the resolution bandwidth to 300 Hz,
the video bandwidth to 10 Hz, and the reference level and position controls as necessary for a
single—sideband noise measurement at ±20kHz from the TI 334.700 MHz carrier frequency.
4.12.9 Verify that the single—sideband noise level is 68 dB below the carrier level.
4.12.10 Set the TI FREQUENCY MHz switches to 108.000.
4.12.11 Set the spectrum analyzer for a frequency span of 5 kHz/div, the resolution bandwidth to 300 Hz,
the video bandwidth to 10 Hz, and the reference level and position controls as necessary for a
single—sideband noise measurement at ±20kHz from the TI 108.000 MHz carrier frequency.
4.12.12 Verify that the single—sideband noise level is 74
dB
below the carrier level.
NOTE
Set the spectrum analyzer frequency span and center frequency controls as necessary to
perform the tests of the TI harmonic spurious noise.
4.12.13 Verify that the harmonic spurious noise is 68 dB below the carrier level at ±12.5kHz from the TI
108.000 MHz carrier frequency.
4.12.14 Verify that the harmonic spurious noise is 71 dB below the carrier level at ±25.0kHz from the TI
108.000 MHz carrier frequency.
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